The purpose of the study is to investigate the bioavailability (rate and extent of absorption) of rabeprazole sodium when a sprinkle capsule granule formulation of rabeprazole sodium is mixed with different dosing vehicles (food, others) and is administered to healthy adult volunteers. Rabeprazole sodium is a drug used to treat patients with Gastro Esophageal Reflux Disease (GERD). GERD is a condition in which the esophagus (tube from throat to stomach) becomes irritated or inflamed because of acid backing up from the stomach.